ddb-table/lib/expressions/ExpressionAttributes.js

Strongly typed library for querying and modeling DynamoDB documents.

"use strict";

exports.__esModule = true;
exports.default = void 0;
var _object = require("../helpers/object");
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
class ExpressionAttributes {
  constructor(init) {
    this.attributesMap = void 0;
    this.attributesMap = _objectSpread({}, init);
  }
  setValue(requestedKey, value) {
    let key = requestedKey;
    let i = 2;
    while (key in this.attributesMap) {
      if (this.attributesMap[key] === value) {
        return key;
      }
      key = `${requestedKey}${i}`;
      i += 1;
    }
    this.attributesMap[key] = value;
    return key;
  }
  serialize() {
    if ((0, _object.isEmpty)(this.attributesMap)) {
      return undefined;
    }
    return this.attributesMap;
  }
}
exports.default = ExpressionAttributes;
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TyxJQUFJLENBQUNRLGFBQWE7RUFDM0I7QUFDRjtBQUFDSyxPQUFBLENBQUFDLE9BQUEsR0FBQVQsb0JBQUEifQ==